EP0419024B1 - Extracteur obstétrical manipulable à aspiration - Google Patents

Extracteur obstétrical manipulable à aspiration Download PDF

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Publication number
EP0419024B1
EP0419024B1 EP19900308653 EP90308653A EP0419024B1 EP 0419024 B1 EP0419024 B1 EP 0419024B1 EP 19900308653 EP19900308653 EP 19900308653 EP 90308653 A EP90308653 A EP 90308653A EP 0419024 B1 EP0419024 B1 EP 0419024B1
Authority
EP
European Patent Office
Prior art keywords
stem
cup
vacuum extractor
child
vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900308653
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German (de)
English (en)
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EP0419024A1 (fr
Inventor
Theodore Chester Neward
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0419024A1 publication Critical patent/EP0419024A1/fr
Application granted granted Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/42—Gynaecological or obstetrical instruments or methods
    • A61B17/44—Obstetrical forceps
    • A61B17/442—Obstetrical forceps without pivotal connections, e.g. using vacuum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/30—Surgical pincettes, i.e. surgical tweezers without pivotal connections
    • A61B2017/306—Surgical pincettes, i.e. surgical tweezers without pivotal connections holding by means of suction
    • A61B2017/308—Surgical pincettes, i.e. surgical tweezers without pivotal connections holding by means of suction with suction cups

Definitions

  • the field of the present invention relates to an apparatus facilitating the extraction of a child during childbirth.
  • a completely natural birth is not possible and assistance must be rendered by the attending physician in order for the child to be delivered.
  • assistance may be rendered with forceps and other similar devices, but these devices tend to be bulky and difficult to operate and their use introduces some chance of injury or discomfort to the mother and child.
  • An alternative to forceps is a vacuum extractor device which uses a vacuum cup for attachment onto the head of the child. Joined to the cup is an elongated stem which is used to manipulate the cup. The physician may then apply a pulling force, accompanied by the proper positioning, to be transmitted to the child's head by manipulation of the stem of the device.
  • U.S.-A-3,202,152 An existing obstetrical vacuum extractor providing the basis for the prior art portion of claim 1 is disclosed in U.S.-A-3,202,152. That patent describes a vacuum operated device, more specifically a vacuum cup, for attaching to the head of a child, an elongated stem joined to the cup which is used to manipulate the cup thereby enabling a pulling force to be applied to the child's head. Although that patent describes an effective vacuum extractor, the device can be difficult to manipulate into position onto the child's head.
  • Another existing vacuum extractor is the Malmström device which has a vacuum cup with a rubber tube attached thereto. A vacuum is applied to the cup through the rubber tube. A chain is attached at one end to the cup and runs through the tube where it may be grasped by the physician in order to extract the cup.
  • the Malmström device can only apply a pulling force and does not provide the physician with control to manipulate the child's head.
  • Such a device is illustrated in US-A-2 702 038 which also illustrates an embodiment having a stiff stem connected by a ball joint to the cup. This also does not provide manipulative control to the physician and does not permit the cup to be positioned parallel with the stem.
  • the present invention is directed to an improved vacuum extractor for childbirth including a cup portion with an elongated stem joined thereto.
  • the vacuum extractor is designed to facilitate positioning onto the head of the child by improved manipulability.
  • a portion of the elongated stem, adjacent to the point where the stem is joined to the cup portion, is provided with additional flexibility to allow bending of the elongated stem at the point of flexibility permitting the cup to be folded into a position substantially parallel to the elongated stem, thereby facilitating insertion into the birth canal.
  • a separate handle piece is attachable to an end of the elongated stem opposite to the cup portion.
  • Figs. 1-5 illustrate a vacuum extractor 10 comprised of an elongated hollow stem 14 which is joined at its front end 14a to the closed rear side of a cup portion 30.
  • the stem 14 includes an opening 18 at a stem rear end 14b which permits communication between the hollow interior 18a of stem 14 and the interior of the cup 30 as best illustrated in the cross-sectional view of big. 3.
  • a flexible hose (not shown) may be placed over the rear end 14b to provide a source of vacuum through stem 14 to the cup 30.
  • the stem end 14b is provided with ribs or sealing rings 20 which are positioned circumferentially about the stem end 14b.
  • the cup portion 30 preferably has a bowl shape having a ridge 40 with a smooth or rounded contour around the outer rim of the open end thereof.
  • the cup 30 has an outwardly rounded side 32 such that the internal diameter of the cup 30 at the ridge 40 is less than the internal diameter of the cup 30 at a midpoint of the side 32 of the cup 30 between its closed end and its open end.
  • the ridge 40 on the open end of the cup 30 has a smooth, rounded contour to provide a gentle and effective contact with the scalp of the child.
  • the stem 14 includes a flexible portion 14c adjacent the cup 30.
  • the wall thickness of the stem 14 at the flexible portion 14c is reduced to provide such enhanced flexibility.
  • the cup 30 may be bent or folded to a position parallel to the stem 14, the stem 14 flexing at the flexible portion 14c, as shown in Fig. 2.
  • the physician may more readily insert the extractor 10 into the birth canal.
  • the cup 30 may be released, the device will unfold and reorient the mouth 40 (back into a position as in Fig. 1) allowing the mouth 40 to be placed in contact with the child's scalp.
  • the flexible portion 14c Positioning the flexible portion 14c adjacent the cup 30 allows the physician to minimize the total diameter of the object being inserted into the birth canal. Having a minimized total diameter or cross section in the folded condition enables the device to be inserted higher into the birth canal than other extraction instruments.
  • the flexible portion 14c is designed to have memory and retain a desired amount of stiffness when it returns to the unflexed position. Proper amount of stiffness relative to the flexibility permits the desired bending characteristic shown in Fig. 2 while providing the desired stiffness for the physician to manipulate the device and guide the head of the child.
  • the flexibility of the flexible portion may be accomplished by a reduced wall thickness. As an example, the thickness over most of the length of stem 14 is about twice the thickness at the stem flexible portion 14c, about 1.5 and 0.76 mm (.06" and .03") respectively.
  • the axial length or height "H" of the bowl shaped cup 30 is also reduced to minimize the outer dimension of the device in the folded condition when it is being inserted.
  • the cup 30 may have a series of reenforcing ribs 42 which are equally spaced about the interior of the cup 30 and extend longitudinally from near the mouth 40 toward the opening at the stem front end 14a.
  • the cup 30 is also provided with a vacuum distributor member 12 which covers the entry from cup 30 to stem 14 to protect the baby's scalp from suction at the opening of the stem front end 14a and to distribute the vacuum applied over an enlarged area on a child's scalp.
  • the details of the distributor 12 are described in U.S. Patent 3,202,152.
  • the present invention also includes an improved handle design for the extractor 10.
  • the handle 24 is preferably comprised of separately molded halves which are attachable to the stem 14 near the stem rear end 14b.
  • One of the two halves has eight posts which align with and snap into eight corresponding holes in the other half so that halves may be assembled in a snap fit arrangement.
  • the stem 14 has one or more longitudinal guides 15 protruding outward from the surface of the stem 14, the handle 24 having internal grooves 26 corresponding thereto such that the grooves 26 mate with the longitudinal guides 15 providing a fit therebetween such that, when in position, the handle 24 does not rotate relative to the stem 14.
  • the stem 14 includes a bottom stop 16a and a top stop 16b. To assemble, the two halves of the handle 24 are snapped together.
  • the above-described construction enables the handle 24 and the stem 14/cup 30 portions to be separately molded.
  • the handle 24 includes curved grooves 28 on side nearest the cup 30 to accommodate positioning of fingers of the physician thereagainst.
  • the handle 24 may be made of a hard plastic thereby providing a stiffer grip surface to provide for more firm manipulation.
  • the cup 30 and the stem 14 of the extractor 10 are preferably injection molded in a single mold from a plastic or plastic-like material such as low density polyethylene to provide a stiff yet reasonably flexible structure. This combination of properties permits the physician to manipulate the extractor 10 and guide the child's head through the birth canal.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Gynecology & Obstetrics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Reproductive Health (AREA)
  • Engineering & Computer Science (AREA)
  • Pregnancy & Childbirth (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Percussion Or Vibration Massage (AREA)

Claims (4)

  1. Extracteur obstétrical à aspiration comprenant une cupule (30) avec une partie antérieure ouverte et une partie postérieure ; une tige (14) avec un évidement interne (18a), une extrémité antérieure (14a) et une extrémité postérieure (14b), l'extrémité antérieure (14a) étant fixée à la partie postérieure de la cupule (30) et l'intérieur de la cupule communiquant avec l'évidement interne (18a) de la tige (14),
       caractérisé en ce que la première partie (14c) de l'extrémité antérieure (14a) de la tige (14) adjacente a la cupule (30) a une flexibilité supérieure a celle du reste de la tige (14), la première partie (14c) étant suffisamment flexible pour permettre une flexion temporaire de la tige (14) afin de positionner la cupule (30) parallèlement à la tige (14) de manière à faciliter son insertion dans la filière pelvienne ; et caractérisé en ce que la tige (14) est suffisamment rigide pour (a) retrouver sa position initiale droite lorsqu'on la relâche et (b) permettre au praticien de manipuler l'extracteur (10) et d'appliquer un moment de torsion sur la tête de l'enfant afin de la guider.
  2. Extracteur à aspiration selon la revendication 1, comprenant de plus une poignée (24) susceptible d'être fixée à l'extrémité postérieure (14b) de la tige (14).
  3. Extracteur à aspiration selon la revendication 1 ou 2, caractérisé en ce que la cupule (30) et la tige (14) sont réalisées d'un seul tenant, en plastique rigide ou autres matériaux apparentés au plastique.
  4. Extracteur à aspiration selon la revendication 1, 2 ou 3, caractérisé en ce que la partie flexible (14c) englobe une partie de la tige (14) adjacente à la cupule (30), ladite partie présentant une paroi moins épaisse.
EP19900308653 1989-09-12 1990-08-06 Extracteur obstétrical manipulable à aspiration Expired - Lifetime EP0419024B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40595889A 1989-09-12 1989-09-12
US405958 1989-09-12

Publications (2)

Publication Number Publication Date
EP0419024A1 EP0419024A1 (fr) 1991-03-27
EP0419024B1 true EP0419024B1 (fr) 1994-10-12

Family

ID=23605935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900308653 Expired - Lifetime EP0419024B1 (fr) 1989-09-12 1990-08-06 Extracteur obstétrical manipulable à aspiration

Country Status (3)

Country Link
EP (1) EP0419024B1 (fr)
JP (1) JPH0644915B2 (fr)
DE (1) DE69013285T2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126331C2 (de) * 1991-08-08 1995-03-16 King Siegfried Griffteil für eine Saugglocke zur Geburtshilfe
GB2296868A (en) * 1995-01-13 1996-07-17 Galal Elhoussein Elsayed Farag Obstetrical rotational vacuum cup
GB2302024B (en) * 1995-06-09 1998-10-07 Malix Polymer Engineering Limi Obstetric vacuum extractor
US7291156B1 (en) * 2003-06-06 2007-11-06 Nicola Perone Obstetrical vacuum extractor with a pull-sensing handle grip
US20080125792A1 (en) * 2006-11-29 2008-05-29 Coopersurgical, Inc. Vacuum Extractor And Method Of Use Therefor
FR3025087B1 (fr) * 2014-11-24 2017-01-20 Pascal Jean Marie Thuret Extracteur foetal humain
CN106798588B (zh) * 2017-03-29 2019-04-05 余军辉 破膜吸盘
CN109925098B (zh) * 2019-04-09 2023-11-24 北京爱康宜诚医疗器材有限公司 夹持器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1087591A (fr) * 1953-03-23 1955-02-25 Soderberg & Co Aktiebolag R Appareil de dégagement pour accouchements
US3202152A (en) * 1963-03-08 1965-08-24 John F Wood Vacuum extractor for childbirth
JPS5132638Y2 (fr) * 1971-09-21 1976-08-13
US4563180A (en) * 1984-06-29 1986-01-07 Raychem Corporation High flow catheter for injecting fluids
JPS6311018A (ja) * 1986-06-30 1988-01-18 東京電力株式会社 再閉路装置
US4784639A (en) * 1987-07-06 1988-11-15 Patel Piyush V Catheter and method of inserting catheter

Also Published As

Publication number Publication date
JPH0644915B2 (ja) 1994-06-15
JPH03111041A (ja) 1991-05-10
EP0419024A1 (fr) 1991-03-27
DE69013285D1 (de) 1994-11-17
DE69013285T2 (de) 1995-02-16

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